Description

Zhang et al reported a nomogram for predicting severe infection in a child with adenovirus pneumonia. The authors are from Nanjing Medical University in China.


Patient selection: child with adenovirus pneumonia

 

Parameters:

(1) respiratory rate in breaths per minute

(2) percent neutrophils in the differential count

(3) percent lymphocytes in the differential count

(4) serum LDH in IU/L, from 0 to 2,400

 

points for respiratory rate =

= (0.6349 * (rate)) - 9.5229

 

points for percent neutrophils =

= 97.065 - (1.0785 * (percent))

 

points for percent lymphocytes =

= 112.5 - (1.25 * (percent))

 

points for serum LDH =

= 0.0102 * (LDH)

 

total score =

= SUM(points for all of the parameters)

 

Interpretation:

• minimum score: 0

• maximum score: 233.07

 

value of X =

= (0.2522 * (score)) - 29.85

 

probability of severe pneumonia =

= 1 / (1 + EXP((-1) * X))

 

Performance:

• The authors claim an area under the ROC curve of 0.94.


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